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EP4088675B1 - Construction de verrouillage rapide à chargement par le haut - Google Patents

Construction de verrouillage rapide à chargement par le haut Download PDF

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Publication number
EP4088675B1
EP4088675B1 EP22164998.1A EP22164998A EP4088675B1 EP 4088675 B1 EP4088675 B1 EP 4088675B1 EP 22164998 A EP22164998 A EP 22164998A EP 4088675 B1 EP4088675 B1 EP 4088675B1
Authority
EP
European Patent Office
Prior art keywords
rod
implant
passageway
receiver
spinal implant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP22164998.1A
Other languages
German (de)
English (en)
Other versions
EP4088675A1 (fr
Inventor
Chris ITALIAIE
William Rezach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Warsaw Orthopedic Inc
Original Assignee
Warsaw Orthopedic Inc
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Filing date
Publication date
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Publication of EP4088675A1 publication Critical patent/EP4088675A1/fr
Application granted granted Critical
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7004—Longitudinal elements, e.g. rods with a cross-section which varies along its length
    • A61B17/7008—Longitudinal elements, e.g. rods with a cross-section which varies along its length with parts of, or attached to, the longitudinal elements, bearing against an outside of the screw or hook heads, e.g. nuts on threaded rods
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/701—Longitudinal elements with a non-circular, e.g. rectangular, cross-section
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7014—Longitudinal elements, e.g. rods with means for adjusting the distance between two screws or hooks
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
    • A61B17/7038—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other to a different extent in different directions, e.g. within one plane only
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8605—Heads, i.e. proximal ends projecting from bone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8685—Pins or screws or threaded wires; nuts therefor comprising multiple separate parts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B2017/564—Methods for bone or joint treatment
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/03—Automatic limiting or abutting means, e.g. for safety
    • A61B2090/037—Automatic limiting or abutting means, e.g. for safety with a frangible part, e.g. by reduced diameter

Definitions

  • the present disclosure generally relates to medical devices for the treatment of musculoskeletal disorders, and more particularly to a spinal implant system
  • Spinal pathologies and disorders such as scoliosis, kyphosis, and other curvature abnormalities, degenerative disc disease, disc herniation, osteoporosis, spondylolisthesis, stenosis, tumor and fracture may result from factors including trauma, disease and degenerative conditions caused by injury and aging.
  • Spinal disorders typically result in symptoms including deformity, pain, nerve damage, and partial or complete loss of mobility.
  • Non-surgical treatments such as medication, rehabilitation and exercise can be effective, however, may fail to relieve the symptoms associated with these disorders.
  • Surgical treatment of these spinal disorders includes correction, fusion, fixation, discectomy, laminectomy and implantable prosthetics.
  • spinal constructs such as vertebral rods are often used to provide stability to a treated region. Rods redirect stresses away from a damaged or defective region while healing takes place to restore proper alignment and generally support the vertebral members.
  • one or more rods, spinal constructs, and bone fasteners can be delivered to a surgical site.
  • the rods may be independently attached via a spinal construct and/or a plurality of spinal constructs to the exterior of two or more vertebral members. This disclosure describes an improvement over these prior technologies.
  • US 2020/0060731 A1 discloses a spinal implant including a body having an insert received within a bottom portion of the body, the insert receiving a bone screw at a bottom portion for attachment to a spine, a rod assembly received within a rod slot on a side portion of the body, wherein the rod slot does not extend through a top surface of the body, and a locking nut received within a top portion of the body and interlocking with a top portion of the insert.
  • EP 2047815 A1 discloses a spinal fixation device which includes a flexible cable; a plurality of components disposed on the flexible cable; and a plurality of fixing nails, wherein the flexible cable may be movingly received by the fixing nails after it has been fitted with the components, and a screw may be used to secure the flexible cable along with the components onto the fixing nails; wherein two neighboring components disposed on the flexible cable are connected with an adjustable angle.
  • US 2004/215190 A1 discloses systems and methods for aligning and implanting orthopedic fixation or stabilization implants within the body.
  • the system includes at least two bone anchors, at least one of which is provided with an angularly adjustable connector.
  • US 2012/150232 A1 discloses a set screw for use in association with spinal implant assemblies.
  • the set screw includes a threaded base portion extending along a longitudinal axis and formed of a first material, and a friction member extending from a distal end of the threaded base portion and formed of a second material different from the first material.
  • the spinal implant assembly includes a connector member having a passage and an opening in communication with the passage, and an elongate support member positioned within the passage of the connector member.
  • the set screw is threadedly engaged to the connector member and at least partially positioned within the opening, with a distal end portion of the friction member extending into the passage and compressed against an outer surface of the elongate support member to inhibit movement of the elongate support member within the passage.
  • US 2019/183535 A1 discloses a bone fastener comprising a first member defining an implant cavity and a plurality of adjacent grooves.
  • a first band is configured for disposal within the grooves.
  • a second band is configured for disposal within the grooves.
  • a second member is configured to penetrate tissue and includes a head engageable with the first band to provisionally connect the members. The second band is movable for disposal adjacent the first band to fix connection of the members.
  • a spinal implant defined in claim 1.
  • Preferred embodiments are defined in the dependent claims Associated surgical methods are also described herein to aid understanding the invention. These methods do not form part of the claimed invention.
  • a spinal implant comprises a preassembled combination of a rod, a first implant receiver, a second implant receiver, a first crown, a second crown, a first set screw and a second set screw;
  • the first implant receiver having a first rod receiving passageway extending through a first sidewall and through a second sidewall of the first implant receiver in the horizontal direction, the first implant receiver having a first threaded passageway extending in a vertical direction and the first implant receiver including a first base portion for coupling to a first bone screw;
  • the second implant receiver having a second rod receiving passageway extending through a third sidewall and through a fourth sidewall of the second implant receiver in the horizontal direction, the second implant receiver having a second threaded passageway extending in the vertical direction and the second implant receiver including a second base portion for coupling to a second bone screw;
  • the first set screw having a first outside thread pattern extending along an outside circumferential surface of the first set screw and having a size and shape corresponding to a size and shape of the first
  • the disclosure provides for a method of installing a spinal implant (not claimed).
  • the method may include the step of providing a pre-assembled implant, that includes a rod extending in a lateral direction and a first implant receiver having a first passageway extending through a first sidewall and a second sidewall of the first implant receiver in the lateral direction, for example.
  • the first implant receiver may have a first threaded passageway extending in a longitudinal direction and a first base portion for coupling to a first bone screw, for example.
  • a second implant receiver may have a second passageway extending through a third sidewall and a fourth sidewall of the second implant receiver in the lateral direction, for example.
  • the second implant receiver may have a second threaded passageway extending in the longitudinal direction and a second base portion for coupling to a second bone screw, for example.
  • a first set screw having a first outside thread pattern extending along an outside circumferential surface of the first set screw and having a size and shape corresponding to a size and shape of the first threaded passageway may be provided.
  • a second set screw having a second outside thread pattern extending along an outside circumferential surface of the second set screw and having a size and shape corresponding to a size and shape of the second threaded passageway may be provided.
  • the rod may extend in the lateral direction through the first and second passageways and may be constrained from moving in the longitudinal direction by the first and second passageways, for example.
  • the method may further include the step of securing first and second bone screws to a patient and securing the pre-assembled spinal implant to the first and second bone screws, for example.
  • a top loading spinal construct includes two implant receivers that support a rod and be connected to a pair of bone screws, respectively. Further according to the invention, the two implant receivers and the rod are pre-assembled for rapid installation and/or ease of installation to the pair of bone screws. Embodiments of the invention are described below with reference to the Figures.
  • the components of spinal implant system 100 can be fabricated from biologically acceptable materials suitable for medical applications, including metals, synthetic polymers, ceramics and bone material and/or their composites.
  • the components of spinal implant system 100 individually or collectively, can be fabricated from materials such as stainless steel alloys, commercially pure titanium, titanium alloys, Grade 5 titanium, super-elastic titanium alloys, cobalt-chrome alloys, superelastic metallic alloys (e.g., Nitinol, super elasto-plastic metals, such as GUM METAL ® ), ceramics and composites thereof such as calcium phosphate (e.g., SKELITE TM ), thermoplastics such as polyaryletherketone (PAEK) including polyetheretherketone (PEEK), polyetherketoneketone (PEKK) and polyetherketone (PEK), carbon-PEEK composites, PEEK-BaSO4 polymeric rubbers, polyethylene ter
  • Various components of spinal implant system 100 may have material composites, including the above materials, to achieve various desired characteristics such as strength, rigidity, elasticity, compliance, biomechanical performance, durability and radiolucency or imaging preference.
  • the components of spinal implant system 100 individually or collectively, may also be fabricated from a heterogeneous material such as a combination of two or more of the above-described materials, for example.
  • the components of spinal implant system 100 may be monolithically formed, integrally connected or include fastening elements and/or instruments, as described herein.
  • FIG. 1 is a perspective view of a spinal implant system 100 and FIG. 2 is a side view of spinal implant system 100.
  • Spinal implant system 100 includes a first implant receiver 20 and a second implant receiver 20.
  • first and second implant receivers 20 are the same type of implant receiver. However, in other embodiments, first and second implant receivers 20 may be substantially the same, and or similar to one another.
  • First and second implant receivers 20, may each include a passageway 22 for receiving a rod 40, for example.
  • first and second implant receivers 20 may include first and second set screws 50, respectively. Set screws 50 move upward and downward in the vertical direction, labeled as X direction in FIG. 2 , to secure rod 40 within passageway 22.
  • set screw 50 may be a breakoff setscrew having a breakoff portion 52 (see FIG. 2 ), for example.
  • set screw 50 may be a solid setscrew without a breakoff portion, for example.
  • each passageway 22 comprises an aperture extending through the side of implant receiver 20.
  • the passageway 22 is closed at the upper end 23 of implant receiver 20 such that the rod 40 is confined within the passageway 22 in two dimensions.
  • the solid upper end 23 is disposed above the passageway 22.
  • the passageway 22 confines the rod 40 in the vertical direction (labeled as X direction in FIG. 2 ), and in the lateral direction (labeled as Z direction in FIG. 2 ) but still permit some sliding in the horizontal direction (labeled as Y direction in FIG. 2 ).
  • a perimeter of the passageway 22 is enclosed in the vertical direction and in the lateral direction. For example, as illustrated in FIG.
  • the rod 40 is confined in the vertical direction and in the lateral direction by passageway 22 but may permit movement in the horizontal direction.
  • some embodiments may utilize an alternate rod 45 having closed end caps 46, which may constrain rod 45 from moving too far in the horizontal direction and sliding out of passageway 22, for example.
  • FIG. 3A is a side view of an implant receiver 20 and FIG. 3B is a top view of a receiver for use with disclosed spinal implant systems 100.
  • implant receiver 20 includes a threaded passageway 24 for rotatably supporting and receiving set screw 50, for example. Threaded passageway 24 extends in the vertical direction and define a vertical axis A-A of which set screw 50 may move upward and downward in upon rotation of set screw 50.
  • implant receiver 20 may include a passageway 22 for receiving rod 40, for example. Passageway 22 extends in the horizontal direction and define a horizontal axis B-B, which rod 40 is coaxially aligned with.
  • passageway 22 may be shaped like an oval when viewed in a side perspective view as shown in FIG. 3A .
  • passageway 22 may be shaped like a circle, or a square, for example.
  • passageway 22 may have a size and shape generally corresponding to a size and shape of rod 40, for example.
  • a side view cross section of rod 40 may have an oval like shape generally corresponding to a size and shape of passageway 22, for example.
  • FIG. 4 is a side view exploded parts diagram of a spinal implant system 100
  • FIG. 5 is a perspective view exploded parts diagram of a spinal implant system 100.
  • set screw 50 may have an exterior thread pattern 51 having a timing and/or pitch including a size and shape generally corresponding to the timing and or pitch of threads 25 of threaded passageway 24 for example.
  • set screw 50 may include a drive end 53 for coupling to a driver (not illustrated) to rotate set screw 50, for example.
  • Drive end 53 may take any shape, for example a hexalobular shape, a hexaganol shape, a torx shape, etc.
  • an end user may secure rod 40 within passageway 22 of the first and second implant receivers 20 and securely tighten set screw 50 by rotating set screw 50 at drive end 53 such that set screw 50 advances downward along the vertical axis A-A and secures rod 40 against the lower walls of passageway 22, for example.
  • FIG. 6 is a perspective view exploded parts diagram of an implant receiver 20 for use with disclosed spinal implant systems 100.
  • implant receiver 20 includes a base portion 21 having a lower cavity configured to securely couple to bone screw 10 and support a crown 2 in a position above the head portion 11 of bone screw 10, for example.
  • Crown 2 includes curved support surfaces 3 having a size and shape corresponding to a lower portion of the curved surface of rod 40, for example. Accordingly, crown 2 may support rod 40 from beneath rod 40 by directly contacting an underside of rod 40. Additionally, rod 40 may bear down on the lower surface of passageway 22.
  • Spinal implant system 100 may further include an upper ring 8 and a lower ring 9.
  • Upper and lower rings 8, 9 may be C-shaped and configured to securely couple head portion 11 of bone screw 10 within lower cavity of base portion 21, for example. Additional examples of how implant receiver 20 may securely connect to a bone screw 10 via an internal cavity of base portion 21 are also disclosed in detail in each of U.S. Pat. No. 10,335,201 , titled Spinal Implant System and Methods of Use; and U.S. Pat. No. 10,653,455 titled Spinal Implant System and Methods of Use; U.S. App. No. 17/167,258 , titled Instrument for locking Orthopedic Screws.
  • FIG. 7 is a side cross section view of spinal implant system 100.
  • the first and second implant receivers 20 are securely coupled to uniaxial bone screws 10.
  • a surgeon may initially couple the first and second implant receivers 20 to respective bone screws 10 by pushing each of implant receivers 20 down against the bone screw 10 by, e.g., an instrument for locking orthopedic screws.
  • a surgeon may push down on each implant receiver 20 simultaneously and in other examples a surgeon may push down on each implant receiver 20 in sequence.
  • a surgical instrument may push implant receiver 20 down such that the upper and lower rings 8, 9 are seated around the head portion 11 of bone screw 10 and nested within and retained by corresponding cavities 8a, 9a of base portion 21, for example.
  • implant receivers 20 may be secured to bone screws 10.
  • the discussion and illustrations herein are framed in the context of uniaxial bone screws, it is contemplated that in some examples, at least one of the first and second bone screws 10 may be configured as multi-axial screws, sagittal angulation screws, pedicle screws, mono-axial screws, uniplanar screws, fixed screws, anchors, tissue penetrating screws, conventional screws, expanding screws.
  • bone screws 10 may be employed with wedges, anchors, buttons, clips, snaps, friction fittings, compressive fittings, expanding rivets, staples, nails, adhesives, posts, connectors, fixation plates and/or a post, to name a few possible example configurations. 24
  • FIG. 8 is a perspective view of a rod for use with disclosed spinal implant systems 100.
  • rod 45 may be that end caps 46 prevent rod 45 from sliding out of and/or uncoupling from the first and second receivers 20, for example.
  • a spinal implant system 100 or at least a portion thereof, may be pre-assembled before commencing a surgery.
  • rod 40 rather than rod 45, for example.
  • Another advantage of delivering a pre-assembled spinal implant system 100 is that a surgeon may relatively quickly secure the pre-assembled spinal implant system 100 to a pair of adjacent vertebrae of a patient, for example.
  • FIGS. 9 and 10 are side views of a pre-assembled spinal implant 60.
  • a rod 40 is secured within the passageways 22 of first and second implant receivers 20, for example.
  • rod 40 may be substituted for rod 45 in some embodiments.
  • Rod 40 may be securely retained within passageways 22 due to first and second set screws 50 pushing down against rod 40.
  • First and second set screw 50 may be rotated within threaded passageway 24 such they move downward in the vertical direction and provide a compressive force against rod 40 such that rod 40 is in direct contact with the side portions of passageway 22 and the curved support surfaces 3 of crown 2, for example.
  • the upper portion 50 of spinal construct 100 is pre-assembled and the set screws 50 are finger tightened.
  • an end user such as a surgeon may push down against the first and second implant receivers 20 such that the head portion 11 of each of the bone screws 10 is securely coupled to the corresponding implant receiver 20, for example.
  • FIG. 11 is an example flow chart of a method 200 of installation of a preassembled spinal implant 60.
  • the following discussion of method 200 may include reference to components, features, and functionality of spinal implant system 100 as explained above for context, however, the method as disclosed below is not limited to the specific spinal implant system 100 embodiments disclosed above.
  • a spinal implant system may be provided, for example an upper portion 50 of spinal implant system 100 or the like.
  • a first bone screw 10 or fastener and a second bone screw 10 or fastener may be secured to a patient's anatomy, for example, a pair of bone screws 10 may be secured to adjacent vertebrae of a patient.
  • the preassembled spinal implant may be secured to the first and second bone screws 10.
  • the first and second implant receivers 20 are secured to the first and second bone screws 10 by pushing down on the first and second implant receivers 20.
  • each implant receiver 20 may be secured to a corresponding bone screw 10 by pushing implant receiver 20 downward and seating various locking rings 8, 9 around the head portion 11 of bone screw 10 and within various receiving cavities 8a, 9a, of implant receiver 20 as explained above.
  • the first and second implant receivers 20 may be secured to the first and second bone screws simultaneously by, for example, a pair of reduction instruments similar to the rod-reducing instrument described in U.S. Pat. No. 6,790,209 , titled Rod Reducer Instruments and Methods.
  • a rod 40 (or rod 45) may be secured in a final position by sufficiently tightening the first and second set screws 50.
  • the first and second set screws 50 may be rotated by a driver instrument and advanced downward along vertical axis A-A such that they directly contact rod 40 and retain rod 40 in place by a compressive force.
  • a breakoff portion of each of the first and second set screws 50 may be broken off, for example breakoff portion 52 may be broken off by a break-off instrument such as the instruments disclosed in U.S. App. No. 17/104,897 , titled Combination Set Screw Breakoff and Tab Breaker Instrument, for example.
  • a method for installing a spinal implant comprising: providing a pre-assembled implant, comprising: a rod extending in a lateral direction; a first implant receiver having a first rod receiving passageway extending through a first sidewall and through a second sidewall of the first implant receiver in the lateral direction, the first implant receiver having a first threaded passageway extending in a longitudinal direction and a first base portion for coupling to a first bone screw; a second implant receiver having a second rod receiving passageway extending through a third sidewall and a fourth sidewall of the second implant receiver in the lateral direction, the second implant receiver having a second threaded passageway extending in the longitudinal direction and a second base portion for coupling to a second bone screw; a first set screw having a first outside thread pattern extending along an outside circumferential surface of the first set screw and having a size and shape corresponding to a size and shape of the first threaded passageway
  • the method of the first further embodiment further comprising tightening the first and second set screws against the rod such that the rod is secured in place relative to the implant.
  • securing the pre-assembled spinal implant to the first and second bone screws further comprises orienting the pre-assembled spinal implant such that, in a top down view, the rod is oriented directly above the first bone screw and second bone screw.
  • the method of one of the first to third further embodiments further comprising: constraining the rod in the longitudinal direction, and preventing the rod from sliding out of the first rod receiving passageway and second rod receiving passageway.
  • the securing the pre-assembled spinal implant to the first and second bone screws step further comprises simultaneously securing the first implant receiver to the first bone screw and the second implant receiver to the second bone screw.

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Claims (11)

  1. Implant rachidien (100) comprenant :
    une combinaison préassemblée d'une tige (40), un premier récepteur d'implant (20), un second récepteur d'implant (20), une première couronne (2), une seconde couronne (2), une première vis de réglage (50) et une seconde vis de réglage (50) ; et
    le premier récepteur d'implant (20) ayant un premier passage de réception de tige (22) s'étendant à travers une première paroi latérale et à travers une deuxième paroi latérale du premier récepteur d'implant (20) dans la direction horizontale (Y), le premier récepteur d'implant (20) ayant un premier passage fileté (24) s'étendant dans une direction verticale (X) et le premier récepteur d'implant (20) comportant une première partie de base (21) destinée à être accouplée à une première vis osseuse (10) ;
    le second récepteur d'implant (20) ayant un second passage de réception de tige (22) s'étendant à travers une troisième paroi latérale et à travers une quatrième paroi latérale du second récepteur d'implant (20) dans la direction horizontale (Y), le second récepteur d'implant (20) ayant un second passage fileté (24) s'étendant dans la direction verticale (X), et le second récepteur d'implant (20) comporte une seconde partie de base (21) destinée à être accouplée à une seconde vis osseuse (10) ;
    la première vis de réglage (50) ayant un premier motif de filetage extérieur (51) s'étendant le long d'une surface circonférentielle extérieure de la première vis de réglage (50) et ayant une taille et une forme correspondant à une taille et à une forme du premier passage fileté (24) ;
    la seconde vis de réglage (50) ayant un second motif de filetage extérieur (51) s'étendant le long d'une surface circonférentielle extérieure de la seconde vis de réglage (50) et ayant une taille et une forme correspondant à une taille et à une forme du second passage fileté (24) ;
    la première couronne (2) ayant des surfaces d'appui incurvées (3) supérieures ayant une taille et une forme correspondant à une face inférieure de la tige (40), la première couronne (2) étant positionnée à l'intérieur de la première partie de base (21) et au-dessus de la première vis osseuse (10) ; et
    la seconde couronne (2) ayant des surfaces d'appui incurvées (3) supérieures ayant une taille et une forme correspondant à la face inférieure de la tige (40), la seconde couronne (2) étant positionnée à l'intérieur de la seconde partie de base (21) et au-dessus de la seconde vis osseuse (10) ;
    dans lequel la tige (40) s'étend dans la direction horizontale (Y) à travers les premier et second passages de réception de la tige (22) ;
    dans lequel chacun des premier et second passages de réception de la tige (22) est fermé au niveau d'une extrémité supérieure (23) du récepteur d'implant (20) de telle sorte que la tige (40) est confinée à l'intérieur des premier et second passages de réception de la tige (22) dans la direction verticale (X) et dans la direction latérale (Z) ; et
    dans lequel la première et la seconde vis de réglage (50) sont conçues pour être tournées à l'intérieur du premier et du second passage fileté (24), respectivement, de telle sorte qu'elles se déplacent vers le bas dans la direction verticale (X) et fournissent une force de compression contre la tige (40) de telle sorte que la tige (40) est en contact direct avec les parties latérales du passage (22) et empêchée de se déplacer dans une direction latérale (Z) par le premier et le second passage de réception de la tige (22), et la face inférieure de la tige (40) est en contact direct avec les surfaces d'appui incurvées (3) des première et seconde couronnes (2) et la tige (40) est empêchée de se déplacer dans la direction verticale (X) par les première et seconde vis de réglage (50).
  2. Implant rachidien (100) selon la revendication 1, dans lequel, dans une vue de haut en bas, la tige s'étend dans la direction horizontale (Y) de telle sorte que la tige (40) est orientée directement au-dessus de la première vis osseuse (50) et de la seconde vis osseuse (50).
  3. Implant rachidien (100) selon l'une des revendications 1 à 2, dans lequel :
    une première surface supérieure solide (23) du premier récepteur d'implant (20) est disposée au-dessus du premier passage de réception de la tige (22), et
    une seconde surface supérieure solide (23) du second récepteur d'implant (20) est disposée au-dessus du second passage de réception de la tige (22).
  4. Implant rachidien (100) selon l'une des revendications 1 à 3, dans lequel
    un périmètre du premier passage de réception de la tige (22) est fermé, et un périmètre du second passage de réception de la tige (22) est fermé.
  5. Implant rachidien (100) de l'une des revendications 1 à 4, dans lequel la tige (45) comprend un premier embout (46) et un second embout (46).
  6. Implant rachidien (100) selon la revendication 5, dans lequel une taille du premier embout (46) est supérieure à une taille du premier passage de réception de la tige (22) et une taille du second embout (46) est supérieure à une taille du second passage de réception de la tige (22).
  7. Implant rachidien (100) selon l'une des revendications 1 à 6, dans lequel, dans une coupe transversale, la tige (40) comprend une forme ovale.
  8. Implant rachidien (100) selon l'une des revendications 1 à 7, dans lequel les premier et second passages de réception de la tige (22) comprennent une ouverture en forme ovale, respectivement.
  9. Implant rachidien (100) selon l'une des revendications 1 à 6, dans lequel, dans une coupe transversale, la tige (40) comprend une forme circulaire.
  10. Implant rachidien (100) selon l'une des revendications 1 à 6 ou selon la revendication 9, dans lequel le premier et le second passage de réception de la tige (22) comprennent une ouverture en forme de cercle, respectivement.
  11. Implant rachidien (100) selon l'une des revendications 1 à 10, dans lequel les première et seconde vis de réglage (50) sont des vis de réglage à rupture.
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